Greenberg's Guide to Marx Trains by Eric Matzke (1990, Hardcover)

This is a better book for plastic and scale Marx. Pretty good information. This one has a better quantity of illustrations than the earlier guides. It has 136 pages and also shows accessories and HO towards the back. I have this book and will continue to use it for reference. As always, some new information has come to light since the writing of this book. This is still a good book though. Since all guides are scarce, better take the one you can get and upgrade later if need be.